D) Mining
composting, reclamation, and reforestation are all efforts to heal and replenish.
Answer:
true
Explanation:
if you want to be a scientist, you probably want to know what you are studying
Answer:
The ratio of asteroid-A’s acceleration to asteroid-B’s acceleration is 37:7800.
Explanation:
Mass of asteroid-A = m =
Mass of asteroid-B = m' = 
As we know , Force = mass × Acceleration
1) Force on an asteroid-A
where , a is the acceleration due to force applied on asteroid-A
2) Force on an asteroid-B
where , a' is the acceleration due to the force applied on asteroid-B
Same force is exerted on the both the asteroids say F.
F = F'
The ratio of asteroid-A’s acceleration to asteroid-B’s acceleration is 37:7800.
Name two geographic obstacles and one political obstacle that stood in the way of the construction of the Panama Canal.
Answer: The two geographic obstacles that stood in the way of the construction of the Panama Canal was that Panama was very mountainous, and there were a lot of mud slides. One political obstacle was that Panama was part of Colombia. The united states had to negotiate with Colombia before Panama became independent. Engineers had to build a dam, design and build locks, and remove huge amounts of earth and rock in order to overcome the geographical obstacles.
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